From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Declining interest in the cold moulded insulation materials Thermoplax and Pyroplax.
| Identifier | WestWitteringFiles\G\August1921\ Scan18 | |
| Date | 15th August 1921 | |
| To EFC. from R.{Sir Henry Royce} Copy to CJ. ORIGINAL. R4/G15/8/21. X.2494 - COLD MOULDED INSULATION - THERMOPLAX AND PYROPLAX. I thank you for yours (EFC1/T10/8/21) attaching description of Thermoplax and Pyroplax, also samples of same material, but these do not interest us at present. R.{Sir Henry Royce} | ||